Working with your stress response: a practical guide

When you face something important — a presentation, a difficult conversation, a deadline — your body mobilises energy. Heart rate and breathing speed up, attention narrows towards the threat or the task, and digestion and other long-term projects are put on hold. The fast changes come from the sympathetic nervous system, driven largely by adrenaline. The slower hormonal changes, including cortisol, come from the HPA (hypothalamic–pituitary–adrenal) axis.

Short bursts of this response are normal and useful: they help you meet a challenge and then stand down. The research concern is stress that is intense, prolonged, or never followed by recovery — when the system that was built for sprints is asked to run a marathon with no finish line.

It also helps to know that the same bodily state can be read in different ways. A racing heart before you speak in a meeting is the same physiology whether you label it 'I'm falling apart' or 'my body is getting ready'. That label turns out to matter.

In laboratory studies, people who were encouraged to see their racing heart as their body preparing to perform — rather than as a sign of failure — showed healthier cardiovascular responses (more efficient blood flow rather than narrowed blood vessels) and, in some tasks, performed better (Jamieson et al., 2010). Research on stress mindsets similarly suggests that believing stress can be enhancing is linked to better self-reported health and work performance (Crum, Salovey & Achor, 2013).

These are useful findings, not magic. Most of the studies are short-term, often with students or healthy volunteers, and mindset research relies partly on self-report. Reappraisal doesn't remove real problems such as an unmanageable workload, a bullying manager or unsafe conditions — and it should never be used as a reason to tolerate them. Think of it as changing your relationship with the signal, not pretending the situation is fine.

Breathing is one of the few parts of the stress response you can steer directly. Slow breathing with extended exhales nudges the parasympathetic ('rest and digest') branch of the nervous system. In a randomised study, five minutes a day of breathing with longer exhales ('cyclic sighing') improved mood and reduced resting breathing rate more than a matched period of mindfulness meditation did over a month (Balban et al., 2023).

Treat this as promising rather than proven for everyone: it was one study with healthy volunteers, and individual responses vary. Some people find breath-focus uncomfortable or even agitating — if that's you, skip it and use movement, a walk, or a conversation instead. There is no single technique that works for every nervous system.

When pressure rises, it helps to sort what's in front of you into three questions. One: is this a short-term challenge I can meet (a deadline, a talk)? Then mobilise — use the reset below and act. Two: is this a repeating strain I can influence (a recurring meeting that derails my day)? Then change the pattern — renegotiate, delegate, reschedule. Three: is this a structural problem I cannot fix alone (chronic understaffing, unsafe demands)? Then escalate and get support, because no breathing exercise is the right answer to a broken system.

A large Cambridge-led synthesis of 136 randomised trials (about 11,600 adults in non-clinical community settings) found that in-person mindfulness programmes, on average, reduced anxiety, depression and distress and improved wellbeing compared with doing nothing (Galante et al., 2021). The same review is a useful corrective to hype: results varied between settings, many trials had risk-of-bias concerns, and against other active, well-being activities mindfulness was often not clearly better. In other words, it helps many people on average, not everyone.

Reflective prompt: across the last month, which calming practice have you actually used more than twice, and what effect did you notice? Keep what works for your nervous system and drop what doesn't — the evidence supports choice, not one prescribed method.